I create a window using GLUTCREATEWINDOW

https://www.opengl.org/documentation/specs/glut/spec3/node16.html

and need MPlayer to run a video in the window created ...

(should be
some other list ... just tell me please!)

how to retrieve window
handle (or other information) I should pass to Mplayer (through -wid parameter? ... I am not sure)?

appreciate any hint!

Philippe